VACUUBRAND VNC 2 - Manual (Page 30)

Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999161 / 27/03/2012
page 30 of 45
The VACUUBRAND DAkkS calibration laboratory is accredited by the Deutsche Akkreditierungsstelle
GmbH (national accreditation body of the Federal Republic of Germany) for the measurable variable
pressure in the pressure range from 7.5*10 -4 Torr to 975 Torr (10 -3 mbar to 1300 mbar) in accordance with
the general criteria for the operation of testing laboratories defined in the DIN EN ISO/IEC 17025:2000
series of standards (accreditation number D-K-15154-01).
Rely on calibration in the VACUUBRAND calibration laboratory:
- To meet the requirements of the DIN ISO 9000ff and 10012 series of standards regarding the calibra-
tion of inspection, measuring and test equipment at specified intervals.
- To document that the vacuum gauges calibrated are traceable to national standards of the PTB
(Physikalisch-Technische Bundesanstalt; German national institute for science and technology and
the highest technical authority of the Federal Republic of Germany for the field of metrology and
certain sectors of safety engineering).
Setting of the interface
Setting of the interface parameters directly at the controller is described below. Enter the device menu
”Select, RS 232”. The factory-set values are underlined. Adjust interface parameters with keys s or
t
and confirm with ”Enter”.
➨ Baud 2400, 4800.9600 or 19200
➨ Parity: 7 data bits odd (Parity 7-O-1); 7 data bits even (Parity 7-E-1);
8 data bits none (Parity 8-N-1)
➨
Handshake (Handsh.): no Handshake (Handsh. None), XON/XOFF Handshake (Handsh. Xon-
Xoff ), RTS/CTS Handshake (Handsh. RTS-CTS)
➨ Remote On, Remote Off,
➨ Startbit = 1, Stopbit = 1
➨ Sending: timeout 1s, receiving: timeout 10s
In remote mode (Remote On, ”P” is displayed) all keys at the controller are without function. To return to
the manual operation of the controller, set the controller to the mode ”Remote Off” via the interface or
switch off controller and enter the device menu within the first 2s after having switched on the controller
again.
DAkkS Calibration Controller VNC 2 ...........................................................................................900217
Control of measuring equipment
Interface parameters
The controller VNC 2 is equipped with a serial interface (RS 232C, nine-pole Sub-D-plug).
☞
Plug-in or remove the cable (cable RS 232C) from the interface only if the equipment is switched
off.
☞ The interface is not electrically isolated from the measuring circuit.
☞ For optimal electromagnetic compatibility assemble an interface filter (cat. no.: 638235).
The controller can be operated via serial interface. Measuring results, preselections and the status of the
controller can be read at any time.
Factory-set the read and write commands are completely compatible to the VACUUBRAND con-
troller CVC 2000. An extended instruction set compatible with CVC 3000 is available using the
command ”CVC 3”.
Calibration in the factory